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Geometry Semester 2 > Ch. 10 First Quiz > Flashcards

Ch. 10 First Quiz Flashcards

1
Q

Diameter

A

A straight line inside a circle with endpts. on the circle

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2
Q

Radii

A

A straight line from the center of a circle to the side

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3
Q

Chord

A

A straight line that does not touch the center with endpts. on the circle.

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4
Q

Secant
Seagull

A

A straight line that does not touch the center that goes out of the circle.

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5
Q

Tangent and Pt. of Tangency

A

A straight line that touches the circle at only one point. The point is pt. of tangency.

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6
Q

Tangent Circles

A

Circle with one point of intersection

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7
Q

A line is tangent to a circle iff…

A

There is a straight line which touches the circle at only one point
The tangent is perpendicular to the radius at the point of tangency.

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8
Q

If 2 segments from the same exterior point are tangent to a circle…
Ice cream cone

A

They are equal.

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9
Q

How to find the measure of minor arc

A

It’s the measure of the central angle

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10
Q

How to find the measure of major arc

A

360 - minor arc

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11
Q

Two circles are congruent iff

A

they have the same radii

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12
Q

In the same circle, or congruent circle, two minor arcs are congruent iff

A

their corresponding chords are congruent

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13
Q

If one chord is the perpendicular bisector of another chord…
Fat guy with one arm

A

The first chord is a diameter

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14
Q

If the diameter of a circle is perpendicular to a chord…
Pants

A

Then the diameter bisects the chord and its arc

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15
Q

Two chords are congruent in the same circle iff…
Like a baseball field

A

They are equidistant from the center.
Once you know the chords are congruent… the arcs are also congruent

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16
Q

Inscribed Angle

A

Angle whose vertex is on a circle and sides are chords

17
Q

Intercepted Arc

A

Arc across from inscribed angle

18
Q

The measure of an inscribed angle is…

A

Half of its intercepted arc

19
Q

If two inscribed angles intercept the same arc…
Spiderman

A

Then the angles are congruent

20
Q

Inscribe
Harry Potter

A

Circle inside

21
Q

Circumscribe

A

Circle outside

22
Q

If an angle is inscribed in a semicircle…

A

It’s half the measure of a semicircle (180 degrees), measuring 90 degrees

23
Q

If a quadrilateral is inscribed…

A

Opposite angles are supplemental

Geometry Semester 2 (9 decks)

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